Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba68d1e8304ba2a…

MALICIOUS

PDF

89.4 KB Created: 2021-07-23 21:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8eeae8732179a12ea8978fe6292bd2a3 SHA-1: c82fb4fef7963015adc62a96cfdbe13ea8067f65 SHA-256: 5ba68d1e8304ba2aaa919d8fe0e00a6bddbef0dff512dc5f2053f8e95c5c676a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and a high ML classification score. The presence of numerous external URLs, many hosted on potentially disposable domains or compromised CMS uploads, suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30f6e7889---vuwuradiwixapezonukeleleb.pdf In PDF document text
    • https://nic-irq.com/userfiles/files/26163394909.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbcf5dc278---51027147924.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a0bbd55d2---siwewed.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1e0583513---pawifek.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a574ec933d3---97783698359.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/guzujajenid.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/pimejumifod.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/pelafitarizaxodo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c38e3fe39c142408d4b7356490cb95de/34145341373.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/gikowinopavemosij.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/52966fb6e81bb5957bec93d43c52f8be/68110296756.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/juzakewasiluwidor.pdfIn PDF document text
    • http://coumert.com/images/file/lijeto.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/2445481035.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/giwawirunisozit.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/21610588929.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/79089fd18f2abd9403a6926ed4c6540f/74527505921.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/89558015876.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2u2ciklmtppd4d1q4fngb93vm2/50560609673.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ob1541goststp1aucq0njvbluo/wotabidutizamodasa.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/c25255bd4fa2ddf4df2df269bd6feccc/fujupilurutikezaveb.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/25332706435.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab86dd9775---zanimote.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-2/20210502225118540541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=wedding+invitation+card+writing+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 10796 bytes
SHA-256: 911af9440e3cfbfb819e3ba6b7f60e8fad8f5cb6adc02c480c83b2ca1e2e0c08
font_02_sfnt_off0001295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 17548 bytes
SHA-256: cad5a2260953e269c6aab275a7160a91552b40cb7751e9b69f202074e233e18d